GUUDIES Journal
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Dry Skin in Winter UK: Which Supplements Actually Help Your Skin Barrier
Winter skin isn't just a topical problem. Dry central heating, cold air, and the fact that most people eat worse from November to January all contribute. But there's a nutritional layer to skin barrier function that no amount of moisturiser...
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Marine vs Bovine Collagen: Which Is Better? (UK Guide)
Marine vs bovine collagen compared: source, collagen types, what the skin trials actually used, doses, allergens and diet suitability, and which one suits you. Sources included.
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Hair, Skin and Nails Vitamins: Which Ones Work? UK Guide (2026)
Which hair, skin and nails vitamins have real backing? Biotin, zinc, selenium, vitamin C and copper explained using the GB-authorised claims, safe upper limits, how long to give gummies, and how to read a label. Sources included.
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Biotin for Hair Growth: What the Evidence Really Shows
What the evidence says about biotin for hair growth, the authorised UK claim, how much biotin you need and why you should tell your doctor before a blood test.
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Do Collagen Gummies Work? What the Evidence Really Shows (UK)
Do collagen gummies work? What the skin trials actually used, why gummies hold far less collagen, what the latest independent evidence says, and how to choose a collagen gummy in the UK.
